Quarterly report [Sections 13 or 15(d)]

Other Expenses and Charges - Restructuring Activity (Details)

v3.26.1
Other Expenses and Charges - Restructuring Activity (Details)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
employee
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
employee
Restructuring Reserve [Roll Forward]          
Beginning balance     $ 8 $ 5 $ 5
Restructuring Charges $ 5 $ 13 10 13  
Payments for Restructuring     (8) (5)  
Ending balance 10 13 10 13 8
Hotel Franchising Segment          
Restructuring Reserve [Roll Forward]          
Restructuring Charges     3    
Corporate Segment          
Restructuring Reserve [Roll Forward]          
Restructuring Charges     7    
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent          
Restructuring Reserve [Roll Forward]          
Ending balance 8   8    
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent          
Restructuring Reserve [Roll Forward]          
Ending balance 2   2    
2025 Restructuring Plan          
Restructuring Reserve [Roll Forward]          
Beginning balance     8 0 0
Restructuring Charges     4 13  
Payments for Restructuring     (6) (2)  
Ending balance 6 11 6 11 $ 8
2025 Global Cost Basis and Streamlining Plan          
Restructuring Reserve [Roll Forward]          
Restructuring Charges 1 13 4 13  
2025 Global Cost Basis and Streamlining Plan | Hotel Franchising Segment          
Restructuring Reserve [Roll Forward]          
Number of employees impacted | employee         202
2026 Restructuring Plan          
Restructuring Reserve [Roll Forward]          
Beginning balance     4    
Restructuring Charges 4   6    
Payments for Restructuring     (2)    
Ending balance 0   $ 0   $ 4
Number of employees impacted | employee     39    
Employee Severance | 2025 Restructuring Plan          
Restructuring Reserve [Roll Forward]          
Beginning balance     $ 4 0 0
Restructuring Charges     4 8  
Payments for Restructuring     (5) (2)  
Ending balance 3 6 3 6 4
Employee Severance | 2026 Restructuring Plan          
Restructuring Reserve [Roll Forward]          
Beginning balance     0    
Restructuring Charges     3    
Payments for Restructuring     0    
Ending balance 3   3   0
Employee Severance | 2024 Restructuring Plan          
Restructuring Reserve [Roll Forward]          
Beginning balance       5 5
Restructuring Charges       0  
Payments for Restructuring       (3)  
Ending balance   2   2  
Facility Closing | 2025 Restructuring Plan          
Restructuring Reserve [Roll Forward]          
Beginning balance     4 0 0
Restructuring Charges     0 5  
Payments for Restructuring     (1) 0  
Ending balance 3 $ 5 3 $ 5 4
Other Restructuring | 2026 Restructuring Plan          
Restructuring Reserve [Roll Forward]          
Beginning balance     0    
Restructuring Charges     3    
Payments for Restructuring     (2)    
Ending balance $ 1   $ 1   $ 0